What are common symptoms of grief and grieving?
A wide range of feelings and symptoms are common during grieving. While you are feeling shock, numbness, sadness, anger, guilt, anxiety, or fear, you may also find moments of relief, peace, or happiness. And although grieving is not simply sadness, "the blues," or depression, you may become depressed or overly anxious during the grieving process.
The stress of grief and grieving can take a physical toll on your body. Sleeplessness is common, as is a weakened immune system over time. If you have a chronic illness, grieving can make your condition worse.
Source: http://www.webmd.com